Means for obviating water hammer in service pipes



March 2, 1937.v G. JEssoP l' I 2,072,715

MEANS FOR OBYIATING WATER HAMMER IN SERVICEv PIPES..

Filed March 16, 1936 flyj xNS/ENTcR.

Patented Mar. 2, 1937 PATENT GFFICE MEANS FOR OBVIATING WATER HAMMER IN SERVICE PIPES George Jessop, Ingle Nook, Gomersal, near Leeds, England Application March 16, 1936, Serial No. 69,150 In Great Britain March 22, 1935 1 Claim.

This invention relates to improved means for obviating water hammer in service pipes. As is well known, the cause of water hammer is primarily due to excessive pressure in the water 5 supply. When a cock or tap controlling the discharge of cold water from a pipe feeding a cistern, the supply to which is eifected by a ball cock, is closed, the impulse imparted to the water is transmitted by the pressure to the ball cock lever through the ball cock valve. The movement of the ball starts ripples on the surface of the water in the cistern. This movement causes the valve to be continually sipping water from the supply, thereby obtaining force from the high pressure supply to ensure the completion of this cycle. The primary object of this invention is to overcome this drawback in a simple and reliable manner.

The present invention comprises means for damping out the oscillations of the ball cock lever.

A convenient means for effecting the object in view, comprises a baille plate consisting of a disc provided With an upstanding boss to form an air chamber on its underside suspended from the ball oat or its lever by suitable means so that the baiile plate or its equivalent is always submerged.

This invention will be now more particularly described making reference to the accompanying drawing in which:-

Fig. 1 is a view in sectional side elevation of a cistern, supplied with cold water through a ball cock valve, tted with the present invention.

Fig. 2 is a View in plan thereof.

Fig. 3 is a broken view in side elevation of a modification.

Figs. 4 and 5 are views in side elevation and plan respectively of a modified form of baiile plate.

Throughout the views similar parts are marked with like gures of reference.

A cistern l is fed with cold water 2 from a 45 service pipe 3 through a valve 4. The valve 4 is opened and closed by means of a lever 5 operated by the ball float 6. The outlet for the water from the cistern is by means of a pipe 1. So far, all these parts are of well known construction. A baflle plate 8, which may consist of a thin flat disc, as shown in Figs. 1 3, preferably of aluminium or other relatively light Weight ma- 5 terial, is attached at its centre to the one end of a ilexible connecting means, such as a chain 9, the other end of which is attached to the lever 5. 'I'he length of the chain 9 and the limits of movement of the lever 5 are in such relation that 10 the baile plate 8 is always submerged in the water 2 and well below any level it may assume.

The chain 9 is preferably attached to the lever 5 as near the ball float 6 as is practicable, as shown in Figs. 1 and 2. 15

In a further modification, the baiile plate 8 may be attached directly to the ball o-at 6 and in order to readily adapt the invention to existing cisterns, the baille plate 8, see Fig. 3, may be attached to the ball float 6 by means of a clip I0, 20 for instance a three pronged clip embracing the ball iloat 6 as shown.

The bale plate 8 instead of being a flat disc, is preferably dished or domed, or may be formed with a centrally arranged upstanding boss Il, 25 see Figs. 4 and 5, forming a small air chamber or cavity l2 on its underside. As the baffle plate or its equivalent is always submerged, and since the ripple produced on the Water within the cistern is purely a surface ripple, it does not 30 communicate any motion to the baffle plate, which thereby controls or prevents an oscillatory movement of the ball cock lever.

I declare that what I claim and desire tosecure by Letters Patent isz- 35 Means for obviating water hammer in service pipes supplying cold water to a cistern by means of a ball cock, comprising in combination a disc of relatively light weight material, an upstanding boss in said disc to form an air chamber on its 40 underside, and a. chain attached by its one end to the disc and at its other end to the ball cock lever near the ball, the said chain being of such a length as to ensure that the disc is always below the level of the Water in the cistern, as set forth.

GEORGE JESSOP. 

